A space-based, high-resolution view of notable changes in ...
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Nitrogen oxides (NOx = NO + NO2) are produced during combustion processes and, thus may serve as a proxy for fossil fuel-based energy usage and coemitted ... Skiptomaincontent Home>Aspace-based,high-resolutionviewofnotablechangesinurbanNOxpollution... Aspace-based,high-resolutionviewofnotablechangesinurbanNOxpollution... Duncan,B.,L.N.Lamsal,A.M.Thompson,Y.Yoshida,Z.Lu,D.Streets,M.Hurwitz,andK.E.Pickering(2016),Aspace-based,high-resolutionviewofnotablechangesinurbanNOxpollutionaroundtheworld(2005–2014),J.Geophys.Res.,121,doi:10.1002/2015JD024121.Abstract: Nitrogenoxides(NOx=NO+NO2)areproducedduringcombustionprocessesand,thusmayserveasaproxyforfossilfuel-basedenergyusageandcoemittedgreenhousegasesandotherpollutants.Weusehigh-resolutionnitrogendioxide(NO2)datafromtheOzoneMonitoringInstrument(OMI)toanalyzechangesinurbanNO2levelsaroundtheworldfrom2005to2014,findingcomplexheterogeneityinthechanges.WediscussseveralpotentialfactorsthatseemtodeterminetheseNOxchanges.First,environmentalregulationsresultedinlargedecreases.TheonlylargeincreasesintheUnitedStatesmaybeassociatedwiththreeareasofintensiveenergyactivity.Second,elevatedNO2levelswereobservedovermanyAsian,tropical,andsubtropicalcitiesthatexperiencedrapideconomicgrowth.TwoofthelargestincreasesoccurredoverrecentlyexpandedpetrochemicalcomplexesinJamnagar(India)andDaesan(Korea).Third,pollutiontransportfromChinapossiblyinfluencedtheRepublicofKoreaandJapan,diminishingtheimpactoflocalpollutioncontrols.However,inChina,therewerelargedecreasesoverBeijing,Shanghai,andthePearlRiverDelta,whichwerelikelyassociatedwithlocalemissioncontrolefforts.Fourth,civilunrestanditseffectonenergyusagemayhaveresultedinlowerNO2levelsinLibya,Iraq,andSyria.Fifth,spatialheterogeneitywithinseveralmegacitiesmayreflectmixedeffortstocopewithairqualitydegradation.Wealsoshowthepotentialofhigh-resolutiondataforidentifyingNOxemissionsourcesinregionswithacomplexmixofsources.Intensivemonitoringoftheworld’stropical/subtropicalmegacitieswillremainapriority,astheirpopulationsandemissionsofpollutantsandgreenhousegasesareexpectedtoincreasesignificantly. PDFofPublication: Downloadfrompublisher'swebsite.ResearchProgram: AtmosphericCompositionModelingandAnalysisProgram(ACMAP)Mission: Aura-OMI NASAHome PageLastUpdated:February17,2021 PageEditor:BradBulger NASAOfficial:BruceA.Tagg WebsiteIssues:ContactUs Budgets,StrategicPlansandAccountabilityReports EqualEmploymentOpportunityDataPostedPursuanttotheNoFearAct Information-DisseminationPoliciesandInventories FreedomofInformationAct PrivacyPolicy&ImportantNotices NASAAdvisoryCouncil InspectorGeneralHotline OfficeoftheInspectorGeneral NASACommunicationsPolicy ContactNASA SiteMap USA.gov OpenGovernmentatNASA
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